이산요소법을 이용한 Graphite 분말 압축 특성 연구
A Study on Graphite Powder Compaction Behaviors Using the Discrete Element Method
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Accurate and effective powder compaction analyses are performed for brittle materials such as graphite, utilized as a solid lubricant, by using the discrete element method (DEM). The reliability of the DEM analysis is confirmed by comparing the results of graphite powder compaction analyses using the DEM particle bonding contact model and particle non-bonding contact model with those from the powder compaction experiment under the same conditions. To improve the characteristics, the parameters influencing the compaction properties of the metal-graphite mixtures are explored. The compressibility increases as the size distribution of the graphite powder increases, where the shape of the graphite particles is uniform. The improved compaction characteristics of the metal-graphite (bonding model) mixtures are further verified by the stress transmission and compressive force distribution between the top and bottom punches. It is confirmed that the application of graphite (bonding model) powders resulted in improved stress transmission and compressive force distribution of 24% and 85%, respectively
Abstract
Accurate and effective powder compaction analyses are performed for brittle materials such as graphite, utilized as a solid lubricant, by using the discrete element method (DEM). The reliability of the DEM analysis is confirmed by comparing the results of graphite powder compaction analyses using the DEM particle bonding contact model and particle non-bonding contact model with those from the powder compaction experiment under the same conditions. To improve the characteristics, the parameters influencing the compaction properties of the metal-graphite mixtures are explored. The compressibility increases as the size distribution of the graphite powder increases, where the shape of the graphite particles is uniform. The improved compaction characteristics of the metal-graphite (bonding model) mixtures are further verified by the stress transmission and compressive force distribution between the top and bottom punches. It is confirmed that the application of graphite (bonding model) powders resulted in improved stress transmission and compressive force distribution of 24% and 85%, respectively
참고문헌 (20)
- P. R. Gibson, , Wear, 92, pp.193~ (1984)
- H. Nayeb-Hashemi, , Wear, 150, pp.21~ (1991)
- A. G. Wang, , Mater. Sci. Technol, 5, pp.71~ (1989)
- G. Goller, , Metall. Mater. Trans. A, 27, pp.3727~ (1996)
- 양호영, "고체윤활 graphite 소재의 마모 특성에 관한 연구", 한국추진공학회지, 17(5), pp.95~100 (2013), 한국추진공학회[DOI]
- R. Gilardi, , Materials, 5, pp.2258~ (2012)
- Y. Sheng, , Eng. Comput, 21, pp.304~ (2004)
- J. F. Jerier, , Powder Technol, 208, pp.537~ (2011)
- M. Ucgul, , Biosyst. Eng, 129, pp.298~ (2015)
- C. Santos, , Geophysics, 76, pp.165~ (2011)
- P. W. Cleary, , Miner. Eng, 74, pp.178~ (2015)
- P. A. Cundall, , Géotechnique, 29, pp.47~ (1979)
- D. O. Potyondy, , Int. J. Rock Mech. Min. Sci, 41, pp.1329~ (2014)
- C. L. Martin, , J. Mech. Phys. Solids, 52, pp.1691~ (2014)
- N. A. Fleck, , J. Mech. Phys. Solids, 43, pp.1409~ (1995)
- C. L. Martin, , J. Mech. Phys. Solids, 51, pp.667~ (2003)
- Y. Sun, , Trans. Nonferrous Met. Soc. China, 30, pp.2177~ (2020)
- A. Simchi, , Mater. Des, 24, pp.585~ (2003)
- S. Brown, , J. Mech. Phys. Solids, 42, pp.383~ (1994)
- E. Olsson, , Powder Technol, 243, pp.71~ (2013)